Oh dear God! I just thought of something. Okay, so Nicole got pregnant. Check. Nicole's had a history of problems dealing with pregnancy. We all believe that because Nicole is now pregannt, the writers are just forgetting history. What if, Nicole can't carry the child to term, and needs a surrogate to carry the child the full 9 months. And what if this surrogate just so happens to be Sami. That would explain Alison Sweeney's pregnancy, yet it wouldn't tie down Sami with yet another child so soon after having the twins.

I hope this isn't the case, but it definitely makes sense.

But if she's already pregnant, I don't think you can then transfer the embryo to someone else, lol. I think it has to happen beforehand.